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If population increased from 1000 to 1200, what will be the percentage growth?

Answer and explanation

Correct answer: 20 percent

The direct answer is B: 20 percent. Percentage growth means the increase compared with the original population. First find the increase: 1200 − 1000 = 200. Next divide this increase by the original population, not the new population: 200 ÷ 1000 = 0.2. Finally multiply by 100: 0.2 × 100 = 20 percent. Therefore, the population grew by 20 percent. Option A is wrong because 10 percent of 1000 is only 100. Option B is correct because 20 percent of 1000 is 200. Option C is wrong because 30 percent would mean an increase of 300. Option D is wrong because 50 percent would mean an increase of 500. Memory cue: percentage change always uses the old value as the base.

Related tags

Percentage GrowthPopulation CalculationPopulation GrowthPopulationGeographyClass 9 Mcq

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